Personal spirometer



FIG. 1 is a perspective view of a personal spirometer showing my new design;

FIG. 2 is a front view thereof;

FIG. 3. is a rear plan view thereof;

FIG. 4. is a right side view thereof;

FIG. 5. is a left side view thereof;

FIG. 6. is a bottom view thereof; and,

FIG. 7. is a top view thereof.

The broken lines in the figures illustrate unclaimed environment only and form no part of the claimed design. 

CLAIM The ornamental design for a personal spirometer, as shown and described. 